the question is find the sum of first 15 multiples of 8 (a.p of 10th std). my doubt is that why can't we take 0 as a multiple of 8 so if that is the the first term will be 0 and when i solve it i don't get the ans write because they have taken the first multiple as 8 not 0 .but why?

Asked by Soujanya | 1st Jun, 2016, 05:54: PM

Expert Answer:

I f space 0 space t o space b e space t a k e n space a s space a space m u l t i p l e space o f space 8 comma space t h e n space w e space s h o u l d space t a k space minus 8 comma space minus 16 comma space minus 24 comma space minus 32... space a n d space s o space o n space a s
m u l t i p l e s space o f space 8 space a n d space t h e r e space i s space n o space e n d.
H e n c e space u n l e s s space s p e c i f i e d comma space b y space c o n v e n t i o n space w e space a r e space s u p p o s e space t o space t a k e space f r o m space n o n minus z e r o space n u m b e r space o n l y.
M u l t i p l i c a t i o n space t a b l e space i s space t h e space b e s t space e x a m p l e.
W e space a r e space n o t space f i n d i n g space 0 cross times 8 equals 0
I t space s t a r t s space f r o m space 1 cross times 8 equals 8
S o space y o u space h a v e space t o space t a k e space f r o m space n o n minus z e r o space n u m b e r space o n l y.

Answered by Vimala | 3rd Jun, 2016, 11:41: AM