Card 1 of 22
What does u10u_{10}u10 represent?
A
The tenth term of the sequence.
B
For r≠1r\neq1r=1, the first nnn terms of a geometric series sum to Sn=a(1−rn)1−r\boxed{S_n=\frac{a(1-r^n)}{1-r}}Sn=1−ra(1−rn).
C
For positive terms, 0<r<10<r<10<r<1 produces terms that decrease towards zero, while r>1r>1r>1 produces terms that increase.
D
20000(0.85)4=£10,440.1320000(0.85)^4=£10{,}440.1320000(0.85)4=£10,440.13 to the nearest penny.
Card 1 of 22
3.4.5 Sequences and Series (A-level only) Flashcards
22 flashcards on WJEC A Level Maths 3.4.5 Sequences and Series (A-level only): the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4.