Q. An Arithmetic progression consists of 37 terms.The sum of first 3 terms is 12 and the sum of last 3 terms is 318,then find the first and last term of the AP
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Step-by-step explanation:
l=37
a+a+d+a+2d=12
3a+3d=12
a+d=4
a+34d+a+35d+a+36d=318
3a+105d=318
a+35d=106
a+ d= 4
a+35d=106
- - -
-34d= -102
d=3
a+d=4
a+3=4
a=1
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