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Let the first term=a
Common Difference=d
Here,
a+2d=14
=>a=14-2d
Again,
a+6d=-2
=>14-2d+6d=-2
=>14+4d=-2
=>4d=-2-14
=>4d=-16
=>d=-4
since, a=14-2d
Therefore, a=14-2×(-4)
=22
l=-14
a+(n-1) d=-14
22+(n-1) (-4) =14
(-4) (n-1) =-8
n-1=-8/-4
n-1=2
n=2+1
n=3
PLZ MARK IT AS BRAINLIEST..
Common Difference=d
Here,
a+2d=14
=>a=14-2d
Again,
a+6d=-2
=>14-2d+6d=-2
=>14+4d=-2
=>4d=-2-14
=>4d=-16
=>d=-4
since, a=14-2d
Therefore, a=14-2×(-4)
=22
l=-14
a+(n-1) d=-14
22+(n-1) (-4) =14
(-4) (n-1) =-8
n-1=-8/-4
n-1=2
n=2+1
n=3
PLZ MARK IT AS BRAINLIEST..
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