Answer :
Answer:
19
Step-by-step explanation:
b=27,c=35 and d=63. as a+c=2b and b+c=2d(Sum of 1st and 3rd term =twice of the second term). So a=19. Therefore the first term of the progression is 19.
Answer:
19
Step-by-step explanation:
b=27,c=35 and d=63. as a+c=2b and b+c=2d(Sum of 1st and 3rd term =twice of the second term). So a=19. Therefore the first term of the progression is 19.