The 7th term of an A... is 46 and its lith
tam is 74
@ find the common difference
6 Find the 1st team
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Answer:
a+6d=46
a=46-6d --------------1
a+4d=74-----------------2
put 1 in 2nd equation
(46-6d)+4d=74
-2d=74-46
-2d= 28
d= 28/-2
d= -14
put d=-14 in equation 1
a=46-6d
a= 46-6(-14)
a= 46+84
a=130
.
d is difference and a is 1st term
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