If the 7th and 13th term of an ap and 34 and 64then the commin differnces is
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given,
t7 = 34= a+(7-1)d. ( a= first term and d= common difference)
a=34-6d. ---- eq 1
t13 = 64= a+(13-1)d
a= 64-12d------------eq2
from eq1 and eq2,,,
34-6d = 64-12d
6d = 30
so,,,,
d =5
i.e. common difference is 5
t7 = 34= a+(7-1)d. ( a= first term and d= common difference)
a=34-6d. ---- eq 1
t13 = 64= a+(13-1)d
a= 64-12d------------eq2
from eq1 and eq2,,,
34-6d = 64-12d
6d = 30
so,,,,
d =5
i.e. common difference is 5
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