If minus x^2 +1/x=5 then find x^4 + i/x^4.

Asked by sakkhogun24 | 27th Nov, 2014, 08:56: PM

Expert Answer:

Q u e s t i o n space i s space n o t space c o r r e c t. space A s s u m i n g space t h e space q u e s t i o n space a s : I f space minus x squared plus 1 over x squared equals 5 comma space t h e n space f i n d space x to the power of 4 plus 1 over x to the power of 4 : S o l u t i o n : minus x squared plus 1 over x squared equals 5 rightwards double arrow x squared minus 1 over x squared equals minus 5 N o w space c o n s i d e r comma open parentheses space x squared minus 1 over x squared close parentheses squared : open parentheses space x squared minus 1 over x squared close parentheses squared equals x to the power of 4 plus 1 over x to the power of 4 minus 2 cross times x squared cross times 1 over x squared rightwards double arrow open parentheses space x squared minus 1 over x squared close parentheses squared equals x to the power of 4 plus 1 over x to the power of 4 minus 2 rightwards double arrow open parentheses minus 5 close parentheses squared equals x to the power of 4 plus 1 over x to the power of 4 minus 2 rightwards double arrow 25 equals x to the power of 4 plus 1 over x to the power of 4 minus 2 rightwards double arrow x to the power of 4 plus 1 over x to the power of 4 equals 25 plus 2 rightwards double arrow x to the power of 4 plus 1 over x to the power of 4 equals 27 I f space t h i s space i s space n o t space t h e space s o l u t i o n space o f space y o u r space q u e s t i o n comma space p l e a s e space r e p o s t space t h e space q u e r y.

Answered by Vimala Ramamurthy | 28th Nov, 2014, 10:05: AM