Plz explain it and solve it .

Asked by Shivendra | 26th Nov, 2017, 09:57: AM

Expert Answer:

begin mathsize 16px style Let space straight a space be space the space first space term space and space straight d space be space the space common space difference space of space the space given space straight A. straight P.
Now comma
left parenthesis straight m space times space straight m to the power of th space term right parenthesis equals left parenthesis straight n space times space straight n to the power of th space term right parenthesis
rightwards double arrow ma subscript straight m equals na subscript straight n
rightwards double arrow straight m left square bracket straight a plus left parenthesis straight m minus 1 right parenthesis straight d right square bracket equals straight n left square bracket straight a plus left parenthesis straight n minus 1 right parenthesis straight d right square bracket
rightwards double arrow straight m left square bracket straight a plus left parenthesis straight m minus 1 right parenthesis straight d right square bracket minus straight n left square bracket straight a plus left parenthesis straight n minus 1 right parenthesis straight d right square bracket equals 0
rightwards double arrow straight a left parenthesis straight m minus straight n right parenthesis plus left square bracket straight m left parenthesis straight m minus 1 right parenthesis minus straight n left parenthesis straight n minus 1 right parenthesis right square bracket straight d equals 0
rightwards double arrow straight a left parenthesis straight m minus straight n right parenthesis plus left square bracket left parenthesis straight m squared minus straight n squared right parenthesis minus left parenthesis straight m minus straight n right parenthesis right square bracket straight d equals 0
rightwards double arrow straight a left parenthesis straight m minus straight n right parenthesis plus left parenthesis straight m minus straight n right parenthesis left parenthesis straight m plus straight n minus 1 right parenthesis straight d equals 0
rightwards double arrow left parenthesis straight m minus straight n right parenthesis left square bracket straight a plus left parenthesis straight m plus straight n minus 1 right parenthesis straight d right square bracket equals 0
rightwards double arrow straight a plus left parenthesis straight m plus straight n minus 1 right parenthesis straight d equals 0
rightwards double arrow straight a subscript straight m plus straight n end subscript equals 0 end style

Answered by Rashmi Khot | 26th Nov, 2017, 08:02: PM