the 14th term of an A.P. is twice its 7th term if its 5th term is 10. Find the first term and common differenceplzz answer i marku brainlist
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a+13d =2(6+2d)
a+13d=2a+12d
a-2a+13d-12d=0
-a+d=0
a-d = 0..........(1)
a+4d=10.........(2)
a-d-(a+4d)=10
a-d-a-4d=10
-5d=-10
d=2
a-2=0
a=2
a+13d=2a+12d
a-2a+13d-12d=0
-a+d=0
a-d = 0..........(1)
a+4d=10.........(2)
a-d-(a+4d)=10
a-d-a-4d=10
-5d=-10
d=2
a-2=0
a=2
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